In quoting results of DMRG calculations, we have restricted ourselves to either discussing results that pertain to short-range correlations (about which there typically is no disagreement), or to results in which the \(B_d\)  dependence has been seriously investigated and the extrapolation to \(B_d\rightarrow \infty \)  appears convincing.
There are also generalizations of DMRG, such as projected entangled pair states (PEPS) [1]},
which uses tensorial generalizations of the matrix product states of DMRG. Because these methods have not been as thoroughly tested and benchmarked as has DMRG, we have largely omitted results obtained from these approaches.
DMRG methods have recently been extended and are beginning to be applied to study dynamical properties of ladders and cylinders [2]}, [3]}. This is a very promising new direction, but one that is still in its infancy. Again, taking a conservative stance, we have mostly not reviewed these results either.
